Thread-brake for first-combing machines.



J. GERSTBERGBR.

THREAD BRAKE FOR FIRST GOMBING MACHINES.

APPLICATION FILED APR.9.1910.

1,040,185. Patented 00111, 1912.

the latter,

specially careful workmanship the brakingaction on the thread is unreliable and non provcments in Th. cad-Brakes for UHE Ysrarss PATENT orricn.

JOHANN GERSTBERGER, OI LGDZ, RUSSIA.

THREAD-BRAKE FOR FIRST-COMBING MACHINES.

Specification of Letters Patent.

Patented Oct 1, 1912.

Application filed April 9, 1910. Serial No. 554,554.

To all whom it may concern:

Beit known that l, IOHANN Gnns'rcnncnn, a subject of the Emperor of Austria-Hungary, and residing at Lodz,'Russian Poland, have invented certain n w and useful Im- First- Combing Machines, of which the following is a specification. V

My invention relates to thread-brakes, for first combing or carding machines, in which the brake consists of a ball, well-known in itself, located in a slotted cup. In the known thread-brakes'of thisty e the thread which is to be braked is pulle from below upward in an axial direction on one side of the cup between the latter and the ball. This form of the brake has a certain disadvantage. Apart from its being difficult to make the face of the cup which is necessarily rounded off in this knownbrake, and on which the ball rests, exactly concentric with even if this can be done by uniform because, owing to impurities being deposited between the cup and the surface of the ball, the braking action on the thread is easily completely negatived, especially as,

' in consequence of the above mentioned formation of the cap, it is not possible automatically to remove such impurities. According to my invention I also employ a ball arranged in a funnel-shaped cup, but the funnel is slotted transversely at diametrally opposite places and is of such shape that, when regarded in section, the ball contacts at two points with the bearing face, so that, on the one hand, a good support of the ballon the bearing face results and, on the other hand, the thread must necessarily be braked at two places. The consequence 'of this is that even if there should be impurities at one place,

funnel, that owing to the movement of the thread and the rapid rotation of the ball caused thereby, all impurities are at once conveyed to the orifice in qnestlon or through the braking ac tion of the ball is still operative at the other form of the transversely-pass the slots out of the funnel and consequently the braking action cannot be impaired.

Two illustrative embodiments of my invention are represented by way of example in. the accompanying drawing, wherein Figure 1 is a side elevation ofone form, and Fig. 2 a section in the plane A- --A in Fig. 1, whilst Fig. 2 but showing a modified form or funnel.

Itcferring'to the drawin 70 designates the ball located in a funne' a. The funnelshaped cavity in the latter, in the form according to Figs. 1 and 2, is of such a shape that, in section," and consequently a supporting is likewise rectilinear in section and'consequently a tangent to the surface of the ball, is obtained in the bottompart for the ball 70.

. The consequence is that the ball, regarded in I prosection, is supported at two points.

'd arvide the funnel. a with two slots 0,

3 is a view similar to Fig;

t is limited by straight lines face I) which i ranged at dia1netrally opposite places,

through which the thread passes and runs below the ball is, but must pass the points of contact of the ball with the bearing surface b. I'provide an orifice e in the bottom of the funnel.

- As Fig. 3 shows, instead of the rectilinear surface I) I may form the funnel in such manner that the ball is rests on a curved face f which likewise affords the possibility of supporting the ball uniformly with certainty' at two points when regarded in sec tion.

Owing to the ball. pressing the thread against the wall of thefunnel at two places according to my invention, an energetic braking action is obtained and maintained with certainty under all conditions, even if one of the two places should be displaced say by impurities, for in any event the one place remains free for the certain braking action. In addition, any impurities which possibly collect at one place are at once conveyed to the orifice e or through the slots 0, d of the funnel by the motion of the thread and by the rapid rotation of the ball produced thereby, and consequently the brake is automatically cleaned.

I claim y In a thread brake the combination with a ball, of a hopper-shaped cup provided with an opening in its bottom beneath the ball and with slots in the lateral walls thereof In testimony, that I claim the foregoing situated at diametrically opposite points,

as my invention, I have signed my name which cup, owing to the opening provided in its bottom, furnishes two successive brakin presence of two subscribing Witnesses. ing places for the thread carried through it J OHANN GER-STBERGER.

in the transverse direction whereby the ro- Witnesses:

tation of the ball is maintained with cer- JAN MATJ, taint-y. ERNST BLEISOT. 

